Fuel oil burner



FUEL OIL BURNER Filed March 26, 1945 T 2 Sheets-Sheet 1 5 JNVENTOR.

WM? $43 4 2 zvaww y 20, T. DE w. RIVERS 2,420,981

FUEL OIL BURNER Filed March 26, 1945 2 Sheets-Sheet 2 INVENTOR. i

Patented May 20, 1947 FUEL OIL BURNER, Thomas De Witt Rivers, Portsmouth, Va.

Application March 26, 1945, Serial No. 584,831

2 Claims. (01. 158-91) This invention relates to fuel oil burners, and

more particularly to that type of oil burner wherein the oil enters an annular fuel chamber at the base thereof, and air to promote combustion, is drawn through the fuel chamber by the natural draft of the stack or chimney of the furnace, or apparatus with which the burner is used.

An important object of the invention is to provide a burner of this type wherein the air entering the burner will be divided and equally distributed throughout the entire area of the combustion chamber of the burner, insuring an even distribution of the air to provide an exceptionally eficient and economical burner. from the standpoint of consumption of fuel.

Another object of the invention is to construct a. burner wherein air enters the burner and passes to the fuel chamber, the air moving over the fuel oil in the fuel chamber, picking up the oil which is burnedin suspension, as the oil-ladened air passes upwardly through the burner.

Still another object of the invention is to provide a. burner which will be exceptionally easy to install and readily dismantled for thorough cleaning.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts here'- inafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawings Figure l is a plan view of a burner constructed in accordance with the invention, portions thereof being broken away to illustrate the conis provided with an inwardly extended flange 6,

which is formed with openings.

The casing 5 is also formed with an annular flange I, which is disposed near the bottom thereof, and extended laterally from the casing.

The base of the burner which is indicated by the reference character 8, is formed with an annular flange 9 on which the annular flange 1 of the casing rests, the flanges I and 9 being held together by means of the screw bolts l0.

The base 8 is provided with openings I l formed in the wall thereof, and theseopenings are provided to admit air at the bottom of the casing.

The bottom of the casing is indicated by the reference character]! and as shown, the central portion of the bottom is substantially frustoconical in shape, the wall of which portion is provided with a plurality of openings llarranged in rows throughout the length thereof.

Due to this construction, it will be seen that air passing into the base -8 through the openings H, may pass upwardly into the frusto-conical shaped portion of the bottom, and pass outwardly through the openings l3.

The-reference character It indicates the mixing cap which is secured to the upper end of.

the frusto-conical shaped .portion of the bottom l2, the cap being disposed in spaced relation with respect to the frusto-conical shaped portion of the bottom l2, by means of the laterally extended fingers Ill'that are formed adjacent to the upper ends of the vertically disposed dividing plates l6 that are arranged at right angles With respect to each other, as clearly shown by Figur 2 of the drawings. j These plates iii are provided with a plurality of openings I! through which air passes to the space between the plates, the plates acting to divide the volume of air passing upwardly through the frusto-conical shaped portion of the bottom l2 to distribute the air evenly throughout the area of the casing directly above the'mixing cap. These plates [6 are formedwith fingers I8, that pass upwardly through openings formed in the mixing cap l4,

where they are bent over to hold theplates to the cap l4.

Threaded bolts indicated by the reference charthreaded openings formed at the upper edge of the frusto-conical shaped section of the bottom l2, as shown by Figure 2 of the drawings.

The mixing cap [4 is also provided with openings 20 that permit the air to pass upwardly through the cap. The mixing cap is also constructed to provide tapered fingers 2| that extend beyond the edge of the f'rusto-conical shapedportion or the bottom l2, the

spaces between the fingers permitting the passage of products of combustion upwardly through the chamber 22 which is formed between the irusto-conical portion of the bottom l2 and the apron 23 that has an outwardly extended upper flange I resting on the annular flange 6, the apron being secured to the flange B, by means or bolts. As

1f. clearly shown by Figure 2 of the drawings'the lower end the apron 23 is spaced an appreciable distance above the bottom l2, and sup: porting legs 25 are secured tothe apron 23," the supporting legs resting on the bottom l2 of the i burner.

, Resting on the flange at the upper end of the the upper end of the frusto-conlcal shaped portion.

' 2. In a liquid fuel burner, a casing having sides,

a bottom wall and an open top, a portion of the bottom of the casing being frusto-conical shaped,

.ther eoipand adapted to admit air to the casing above the fuel oil level in the casing, an apron I supported within the casing, the lower edge of apron 23, is the baille ring 28 which is provided with upwardly and inwardly'extended tapered fingers-21, the fingers 2'I being slightly curvedso.

that the air and products of combustion passing upwardly through the chamber 22 will be caused to take a swirling motion in their upward passage.

, Mounted on the upper end of the casing 5 is the ring 28 which provides a connection between the burner and boiler with which the device is used,

the ring 29 being secured by means of the threaded bolts 29.

The fuel pipe is indicated by the reference character 30, and is connected with a suitable source of fuel oil supply not shown, the flow of oil through the fuel pipe being regulated by suitable valves in the usual and well'knownmanner;

It will of "course be understood that a suitable pilot light-of conventional structure is used with the burner and ignitesthe fuel oil enterin the mixing chamber, which i that part Of the bottom l2, directly under the apron 23.

What is claimed is: 1. In a liquid fuel burner, a, casing having sides,

a bottom wall and an open top, a portion of the bottom of the casing being frusto-conical shaped open at its top and extending upwardly in'the casing, a pipe through which-fuel oil is directed to the bottom, the frustoconical shaped portion ofthe bottom having openings formed in the wall thereof, and'adapted to admit air to the casing above theiuel oil level in the casing, an apron supported within the casing, the lower edge of the apron being spaced from the bottom dividing the lower portion of the easing into a combustion chamber and anair passageway, said casing having air openings disposed opposite to the apron, through which air enters the air passageway, and means disposed Within' the frusto-conical portion of the bottom for equally distributing the air passing upwardly through the frusto-conical portion of the bottom into the'casing above the-apron being spaced from the bottom dividing the lower portion of the casing into a combustion chamber and an air passageway, said casing having air openings disposed opposite to the apron, through which air enters the air passageway, a mixing cap having openings through which air passes upwardly into the casing, resting on the frusto-conical portion of the bottom, said mixing cap having peripheral tapered fingers extending beyondthe upper end of the frusto-conical portion of the bottom, and vertical plates supported by the mixing cap and being extended into the frusto-conical portion of the bottom, distributing the air passing upwardly through the frusto-conical portion of the bottom.

THOMAS DE WITT RIVERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 950,450 Lanoix Feb. 22, 1910 2,293,697 Chadwick Aug. 25, 1942 2,367,460 Dekker Jan. 16, 1945 406,013 Vogel June 25, 1889 516,363 Calkins Mar. 13, 1894 1,944,408 DeVilbis Jan, 23, 1934 2,257,834 Behee Oct. 7, 1941 2,290,544 DeLancey -July 21, 1942 2,302,287 Behrendt et a1 Nov. 17,1942 1,530,079 Hood Mar. 17, 1925 2,128,155 McPherson Aug. 23, 1938 2,261,814 suchland Nov. 4, 1941 2,263,737 Miller-ct a1 Nov. 25, 1941 1,772,750 Lighty 1-, Aug. 12, 1930 FOREIGN PATENTS Number Country j Date 307,756 Italy Feb. 1937 418,414 Great Britain Oct. 24. 1934 49,008 France July 12, 1938 747,483 France Mar. 28, 1933 

